Loop-taker and feed-actuating mechanism for sewing machines



F. PARRY @My i;

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LOP-TAKER AND FEED-AGTUATING MSCIMNISMSl FOR SEWING MACHINES Filed April11, 1942 Nov. 2, 1943.

F. PARRY 2,333,438

LOOP-TAKER AND .FEED-ACTUATING MECHANISMS FOR SEWING MACHINES FiiedApril` 11, 1942 3 Sheets-Sheet 3 ll #I vPatented Nov. 2, 1943 f fr '5a Yme LOOP-TAKER AND FEED-ACTUATINGMECH; f ANISMI-FOR SEWING MACHINES FrankParry, tBridgeport, Conn., assignor'torThe Singer Manufacturing Company;Elizabeth,

N. J., a corporation of New Jersey y j Application April V.;11, 1942,serial No; '438,516

11 claims. '(01. i12-215) This invention relates to sewing machines andhas for an object to provide a sewing machine with loop-taker andkfeed-actuating mechanisms capable of operation at high speeds with aminimum of vibration of the sewing machine;

Another object of this invention vis to provide improved loop-taker andfeed-actuating mechanisms adapted for sewing'machines having awork-supporting arm of the lcylindrical bed type, and in which the workisl fed crosswise ofthe Work-supporting arm.. Other and and morespeciflc 'objects of the invention will be apparent from the followingdescription and claims.

The invention comprises the devices, combinations and arrangementsofparts hereinafter described in connection with the accompanyingdrawings, which illustrate a preferred embodiment of the invention andin which: y

shaft I5 suitably connected to impart endwise reciprocatory movementstoI ai vertically disposed needle-bar I6 carryingatjitslowerend aneyepointed needle I'l. Also supported bythe bracketarm 'head I4 forendwise movement vvis the usual vertically disposed and spring-depressedpresser-Y bar I8 carrying at its lower end a preser-foot Complemental totheneedle I'I, in the formation of lock-stitches, isa lrotary,loop-taker2l] of the horizontal-axis rotary hook type disposed within the work-armI'I at the free end thereof. The loop-taker rhas acylindrical side Wally2| and an end wall-22 from which extends a reduced hub 23 having ashaft-aperture24.clos'ed at 'the inner side of the end wall 22 by a disk25 set into the end Wall 22. *The side Wall 2| of the loop- Fig. 1 is afront elevation, partly invertical section, of a sewing machinecontaining the present improvement. Fig. 2- isY an enlarged front endelevation of the Vwork-arm of themachine,A

6 represents a transverse section of the work-arm4 on substantially theline 6 6 of Fig. 3,'and illustrates the feed-advance rocker. Fig..7,.representsl a transverse sectionv of thework-arm onsubstantally the line'I-l of Fig. 3', and shows the feedbar in elevation. Fig. 8` is` aVtop-plan of the work-arm broken away from its supporting base;

the throat-plate'and cover-plates being removed from the work-arm andthe work-arm'end-,cap-

being shown in section.

As illustrated in the drawings; the sewing. ma-A chine has a hollowsupporting base III. fromV which extends a horizontally disposedwork-supporting arm II of thecylinder-bed "type having a free outer end;said Vwork-supporting arm being preferably integralwith-rthe'base'l'll.' Rising' from the base I0 is the hollow standard I2of a bracket-arm I 3 which terminates atits freeend in a head I4overhang-ing the free end of the work-arm II. u

Rotatably journaled the vbracket-arm "I3 visA a .horizontally disposedrotary actuating or main taker is partly cutaway to provide aneedlethread loop seizingbeak 26; said side wall 2| being alsointernallyl grooved circumferentially to'provide a raceway 21. Journaledin the ,raceway 21 is the peripheral bearing-rib 28 of a thread-carrier29. The thread-carrier 29 houses the usual thread-case 30 which containsa mass of under thread about which the needle-thread loops are castbythe loop-taker.W The thread-` carrier 29 is restrained.againstyrotation with the loop-taker and to that end the thread-carrieris provided withvthe usualstop-notch 3| entered byaY stationary stop-lug32. The stop-lug 32 extends from an angular stop-member 3.3Jsecuredbyscrews 34Yagainst theendv face ofthe work-arm I I. The hub-apertureV24has the usual lubricant-conducting connections with the race.-Y way2T; said connections comprisinga radial duct 35 formed in the -endl wall22 of the looptaker and open to an axially extending duct 35 intheloop-taker side wall2I. n

The hub 2 3 of the loop-taker is secured by screws; vas v3l, upon thereduced end of a `horizontally disposed *loop-taker shaft v?I'extfending lengthwise of the work-arm II The endofthe shaft 38 is.Apreferably spaced from the4 disk b25 of the loop-taker end wall, therebyto,1provide the loop-taker with a lubricant-collecting cavity kbeyondthe"end"'of 4 the shaft and opento the radial duct 35 which is connectedwiththe looptaker raceway. n Y

l As illustrated more particularly in Fig. 3 of the drawings; theloop-taker shaft .38 is rotatably journaled in a needle-roller bearingVY39 disposed directly adjacent the hubu23 ofthe loop-taker, whereby theshaft 38 is adequately supported close to the loop-taker. Theroller-bearing 39 is dis-l posed within and carried by'a bushing lllhaving the longitudinal shaft-opening thereof slightly larger,diametrically, than the shaft 38, wherebelt-pulley 41 carried by themain vor bracketarm shaft I5. The pulleys 45a1j1di I1l are proportionedso that the loop-taker-shaft 38 "rotates twice for each rotation of themain shaft I5, and

the `loop-taker `shaft 38 is located in the workarm so that the axes ofrotation of the shafts l 5 and 38 are disposed in a common verticalplane. Between its` ends, the loop-taler shaft 38passes freely through abushing, 4&secured. by-a4 screw 49 in another transverse wall` 50 oftheworkarm; said wall 50 being located at. the. juncture of the ba'segl.andwork-arm II. A collar 5I. is.V secured upon the shaft :38 to. engageone end of the bushing, thereby 'to restrain said shaft against endwisemovement in one direction.

-.The work is advanced. across. the work-arm- I I by a drop-feedfeed-dog'52, operating through a suitably slotted and flattened portionof a throat-plate '.53 having a needle-aperture 5ft.; said .throat-platehaving segmental. wings secured *by screws upon the curved front andrear .walls of the work-arm-` The feed-dog. 52 overhangs the loop-taker2.0 and is secured by screws 53 upon the upper end of an uprightfeed-bar 51 havingy a clearance opening, 58 for the end portion of thebushing 40 which supports the roller-bearing 39; saidfeed-bar 51. beingdisposed directly adjacent. to the loop-taker hub 23 and at the. side ofthe. loop-taker opposite the: free end. of thefwork-armn The lower endofthe feed-bar 5.1. has. a horizontally apertured split sleeveI 59extending under the loop-taker 20 and clamped by a screw E0- upon afulcru'm-pin. 6L which. lengthwise extends parallel to the loop-takershaft 33. and is disposed vertically below said shaft. The opposite.ends. of the fulcrum-pi-n. 5I. are pivotally journaled in a feed-lift.vrocker compris-ing horizontally spaced rocker-arms: 62. and. 63; saidrocker-arms` extending horizontally forwardly from and being carried. byone. end of a` feedlift rock-shaft 64A disposed substantially parallelto the loop-taker shaft 38. and rearward of the vertical planecontaining the axis of. rotation of said shaft 38. i

The. feed-liftA rock-shaft. G4 is journaled. in a bearing-bushing 6.5suitably secured iny an aperture. .in the transverse wallY l2` of thework-armv II. Adjacent `its opposite end, the rock-shaft 54 is journaledin a bearing-bushing 6B carried by `the transverse wall 50., Clampedupon the. end. of the rock-shaft 64, thebasell, is the split hub of ardepending crank-arm.. El. crank-arno-V SI isv pivotally connected,` in`any suitable manner, to one end of. a pitman 68 ha-vinga strap embracinga feed-lift eccentric (i9 carried by a primary feed-actuating. shaftv`10; the .pitman 6.8. extending rearwardly and. upwardly from saidshaft.A the v pitnianstrap may directly embrace the. eccentric. 6.9, it.is preferred to'interpose therebetween a. needleroller bearing TI, inthemanner as. illustrated more fully in the U. S. patent to S. Zonis, No.2,267,581, dated December 23, 1941.

The feed-actuating shaft 10 is lengthwise parallel to the main shaft I5;one end of said shaft Ill being rotatably journaled in a bearingbushingI2 suitably secured in the lower portion of the Work-arm transverse wall55. The opposite end of'. the shaft 10 is journaled in a ball-bearing 13supported in a wall T4 connecting the front and rear Walls of the baseIi). Adjacent the ball-bearing 13, the rotary shaft 10 carries abelt-pulley 15 connected by a clipbelt 16 to,- a pulley 11 carried bythe main-shaft I5; said belt I6 extending through the bracketarmstandard I2, and said pulleys 15 and 11 -beflng'proportioned so that theshafts I5 and 1U rotate in one-to-one relation. The feed-actuating shaft10 isv disposed vertically below the loop-taker shaft 38; the axes ofrotation of the main-shaft I5, loop-taker shaft 38 and feedactuatingshaftv 1i!vr being all disposed in a common vertical plane, Y

The feed-actuating shaft N1 also carries a` feed-advance eccentric 'I8which `is adjustable as to eccentricity and is. constructedsubstantially in accordance with. the feed-advanceeccentric disclosed.in the U. S. patent to W. Myers, No. 2,128,031 dated AugustY 23,. 193B.In. the pres-I ent instance, as illustrated in Fig.. 4 of the. drawings,the means. employed for manuallylocking the adjusting, memberof the.feed-advance eccentric I8 while effecting adjustment ofsaid eccentriccomprises al spring-retracted plunger-rod'. 119 supported` by the frontwally of the base I0 for endwise. movement.

The feed-advance. eccentric. 1.78.r is embraced by the strapl of apitman. extending forwardlyin an upwardly. inclined .direction,. fromthe feedractuating shaft 10, Preferably, a needleroller bearing. all"is. interposed between` the-'pitman-strap andthe eccentric asf disclosedirrtheA above mentioned Patent. No., 2,26%,58-1.. The4 pitmanf'll isypli/Totally connected., inf a suitable mannen-to a crank-arm Bft-havinga split hub1 clamped. uponone. end of a feed-advance. rock;-

shaft. 82 ldisposed vertically below and parallel to Vthe.I0o1 J-tal' ershaft 38. so. that` its, rocking axis. is also contained in thevertical. plane: .containing the rotation axes, of the shafts. I5, 3%and 1.0i.. This arrangement. of the several shafts referred to lends.itself to high speed operation. of the machine, asi vibration isthereby reduced to a minimum.. v

Adiacent the crank-arm` 8|.,` the feed-advance rock-shaft 82risjournaled iny a bearing-bushing. 83 secured in the transverse wall 50.of the.l work.-- arm` I.|. Adjacent its opposite end, the rockshaft 82is journaled in ay bushing 84 suitably secured in the. work-arm wall4-2. Beyond. the-wall 42', the end; of the. rock-shaft 82 carries anupright feed-advance.' rocker 85 disposedr closely ad'-4 jacenttothewfeed-bar 51 and atthe side. of said feed-bar opposite the loop-takerside.- thereof. The, feed-advance rocked 85v is formed w'rtlr anopeningy v`8d therein, affording` clearance for the: loop-taker.v Vshaftsupporting bushing 40; At'itsupper end, above the bushing 40, theIfeed-advance rocker 85.isfforked tov provide an upwardly` open.`rectangular guideway 81 irr which. is. slidably disposed a pivot-block88. The' pivot-bloei; 88. is apertured. toreceive ay pivot-pin; 8aextend-- ing.. horizontally from the. feed-bar 51. The forward andreturn movements thus impartedtothe feed-bar 51- by theI feed-advancerocker. 85: are coordinated'y with. the rising. and falling move.-

ments imparted" to said feed-bar Yby the-feed-lift rocker 62, 63 totransmit operative work-advancing movements to the'feed-dog 52. f

The described -compactly arranged feeding mechanism lends itselfy tolocationof the feeddog 52 -close to the free end of the work-arm withoutinterfering with removal from the vlooptaker 20 of the thread-case 30for thread' replenishment purposes. ertheless, adequatelysupportedat thefront and rear sides of the loop-taker shaft 38 and is actuated tominimize tilting of the feed-dog-with respect't'o the flattened upperface `of the throatplate 53.

A segmental end-cap 90 is removably applied to the work-armv to enclosethelower and front endV portions thereof; the end wall of said endcaphaving an opening 9| to provide for removal of the thread-case 30without requiring removal vof the end-cap. The base of themachine ispreferably supported by a sub-base 92 of any suitable-height. Asillustrated in Fig. 5 of the drawings, ythe transversewall 42 of thework-arm is provided at the rearward side thereof with an upwardly 'openand forwardly inclined lubricant-pocket or primary reservoir 93; theopen or upper end of the reservoir 93 being disposed below and spacedfrom the flattened portion of a cover-plate 94removably secured byscrews 95 upon the work-arm 4 wall V42. Between the cover-plate 94 andthe throat-plate 53, another and similarly shaped cover-plate 96 isdetachably secured by screws 91 vupon the work-arm I I to provide foraccess to the feed-mchanism-disposed below said coverplate 96. Lubricantmay be supplied'to the reservoir 93 through an aperture 9S providedfinthe cover-plate 94. Y

Disposed in the reservoir 93 and extending from the open upper endthereof to terminate 'in a cavity 99 in the upper face of the work-armwall 42 is a lubricant-conducting wick |00. Adapted to engage the end ofthe wick |90 in the wall-cavity 99 is one limb of a bent connectionwick|0|, of which the other limb extends downwardly through a pivot-sleeve|92 free for turning movement in a vertical aperture formed in the wall42. The pivot-sleeve |02 is provided with a short crank-arm |04extending horizontally beyond the edge of the cover-plate '94, wherebythe pivot-sleeve |02 may be manually turned at will to shift theconnection-wick 19| into and out of engagement with the wick |09; itbeing understood that the connection-wick |0| is packed into thepivot-sleeve |02 for turning l movement therewith. The lowerV end of theconnection-wick |0| extends downwardly from the pivot-sleeve |02 througha radial aperture |05 in the bushing 40, thereby to deliver lubricantinto the shaft-opening 40? of the'bushing 40. i

Within the bushing 40, the loop-taker shaft 38 is externallyprovided-with a spiral lubricantimpelling thread |06 disposed directlybelow the bushing aperture and leading to a' radial aperture |01 in theshaft 38. `The shaft* 38 is additionally provided with an oppositelyspiralling lubricant-impelling thread |08 at the opposite side of andalso leading tothe shaft-aperture |01. The shaft-aperture |01 opens intoa longitudinal bore |09 of the shaft 38; said bore being open at the endof the shaft within the hub 23 of the loop-taker. f

The wick |00 serves'to feed-lubricant from the reservoir 93 to theconnection-'wick |0| when said wicks are in contact with each other. The

The feed-dog 52 is nev` wick lul reeds theiubricanc into the bushing an;

andthe spiral thread |06 impels the lubricant, thus supplied thereto,lengthwise of the shaft 38 to the shaft-aperture |01. Thecounter-spiralling thread |08 guards against 'escape of excess lubricantfrom the end of the bushing 40 adjacent the loop-taker, while permittinga modicumv is provided in the wall 42 and connects the bush-y ing-hole4| with a supplemental lubricant-reservoir H3 comprising an upwardlyopen and substantially vertical pocket formed in the wall 42 below thecover-plate 94.

Extending from and through a side wall aperture of the supplementalreservoir H3 is a lubricant-conducting wick H4 having the opposite endthereof entering a radial aperture l5 of the feed-lift rock-shaft 64beyond the end of the bushing 65. The radial shaft-aperture H5 opensinto a longitudinal bore of the shaft 04, through which shaft-borelubricant is supplied 'to additional radiall ducts H9 of the shaft 64within said bushing .65. Another wick H1 extends, from the supplementalreservoir H3, through'a side wall aperture of said reservoir and intothe open end of a longitudinalbore H8 of the feed-advance rock-shaft 82;said bore H0 ported in an aperture of the work-arm wall 50.

to extend horizontally from said wall. An aperture of the tube |2| isconnected by suitable ducts, provided in the wall and in the bushing 12,with the bearing`aperture 12 of said bushing 12; said bearing aperture12' being closed at the work-arm side of the bushing 'l2 by a suitableplug |22 spaced slightly from the end of the shaft l0. Theshaft 10 isprovided with a longitudinal bore |23 and with suitable radial aperturesconnecting'said bore with the needlebearings 1|, 80 for the pitmanstraps embracing thefeed-lift eccentric 69 and the feed-advanceeccentric 18.

' From the foregoing description, it will be understood that whenlubricant is ysupplied through the aperture 98 of the workarmcover-plate 94 to the primary lubricant-reservoir 93, the lubricantrising in the resi lubricant-conducting connections with the bore- |23of the-feed-actuatingy shaft for delivery to the needle-roller bearings'H and 80. 1 .l

lThe base lo is internally provided with anv 011- rotary arm-shaftjournaled in, said bracket-armi.

av loop-takerv shaft rotatablyl journaledt below said work-support,driving connections with, said: arm-shaft for rotating said loop-takershaft a plurality of times for each rotation of said; arm-l shaft, afeed-actuating shaft journaled below; and in. spaced relation to saidloop-taker, shaft, driving connections with said; arm-shaft independentof the loop-taker shaft driving connectionstherewith for rotating saidfeed-aotuatingshaft. once for each rotation of the arm-shaft saidarm-shaft, loop-taker shaft and feed-actuating shaft havingsubstantially parallely rotation axes disposed in. substantially thesame plane, a workadvancingy feed-dog operating throughv saidwork-support, and connections with said feedactuating shaft forimparting operative workadvancing movements tosaid feed-dog.

2; Ina sewing machine, having; a frame including a work-support, incombination, sub,- stantially parallelY loop-takerv and feed-actuatingrshafts rotatably journaled below said work-sup.- port, a feed-advancerock-shaft journaled below said work-support and having its longitudinalaxis in substantially a vertical plane containing' the axes of rotationof said loop-taker and feedactuatingl shafts, means for rotating saidlooptaker and feed-actuating shafts, means for' actuating saidrock-shaft from said feed-actuating shaft, a work-advancing feed-dogoperating through said work-support, operative connections with saidrock-shaft for imparting workadvancing and return movements to saidfeedl dog, and meansfor imparting rising and falling movements to said'feed-dog. r

3; In a sewing machine having a frame including a work-support, incombination,- aloop-taker shaft; rotatably journaled below saidwork-support a feed-actuating shaft rotatably journaled vertically belowand in spaced relation to said loop-takervshaft, driving connections forrotating said loop-taker shaft a plurality ofA times for each rotationof said feed-actuating shaft., a feed-advancing rock-shaft disposedbetween and substantially parallel to said loop-taker and feedactuatingshafts, said three shafts having their longitudinal axes disposed insubstantially the same vertical plane, means for actuating saidrock-shaft from said feed-actuating shaft, a feedlift rock-shaftdispo-sed below said work-support and substantialiy parallel to saidfeed-advance rock-shaft, means for actuating said feed-lift rock-shaftlfrom said feed-actuating shaft, a feeddog operating throughsaidwork-support, and connections with said rock-shafts for impartingoperative work-advancing movements to said feed-dog.

4. In a sewing machine having a frame includingv a work-support and abracket-arm overhanging said work-support, in combination, a rotaryarm-shaft journaled in said bracket-arm, substantially parallelloop-taker and' feed-actuating shafts rotatably journa-led below saidwork-supsont; a.' freed roolsfshatt iournalied' below said Work-:supportand disposedl substantially parallel to said arm-shafii'f,l said fourIshafts having; theirlongitudinal axesin substantially a; commonverticalplane, driving connections for rot-ating said loop-taker shaft in,two-to-onex and said feedactuating, shaffi; inv` one-to-onerelation to;said arm-shaft',r meansfor, actuating said rock-shaft from saidfeed-actuating@b shaft, a work-advancing feed-dog, and means includingoperative connections with said, rock-shaft for actuating said feed-dogfromsaid ieed-actuatmg shaft.

5. In a. sewing machine having a frame; including a work-support and abracket-arm overhanging, said; work-supporty` in. combination, ,arotary-arm sha journaledin said bracket-arm, a rotary` loop-taker4shaftl journa-ledf below said work-support, arotaryx feed-actuatingshaft journaled verticali-yl below and in spaced relation to saidllomo-taller` shaft; driving connectionsv forrotating said loop-takershaft in two-to-one and saidfeed-actuating shaft in one-to-onvefrelationto said arm-shaft, a feed rook-shaft disposed between and substantiallyparallelto saidfrotary loop-.taker and feed-aotuatingy shafts, said fourshafts having their longitudinal axes disposed insubstantially the samevertical plane, meansA for actuating. said rock-shaft; fromsaidfeed-actuating shafta work-advancing feed-dog?, and meansincludingoperative: connections` with said rockshaft for actuating said feed-dogfrom said feedactuating shaft.. 1-

6. In asewing machinel having a frame including a. Work-support,- invcombination,v a loop-taker shaft rotatably journaledi belowy saidwork-support, a rotary feed-actuating shaft journaledbelowand spacedvertically from said loop-taker shaft, driving connections for rotatingsaid looptaker shaft a plurality ot times for each rotation of saidfeed-,actuatingshaft, a pair offeed rockshafts disposed below saidWork-support and substantially parallel to said rotaryfeed-actuatingshaft, one of said; rock-shafts having its longitudinal``axis in a vertical lplane containing. the axes of rotationA of said!loop-taker and ,feed-actuating shafts, connections with`saidfeed-actuating sha-ft for actuating; said` rock-shafts, awork-advancing feed-dog, and operative connections with saidrock-shafts. for actuating said feed-dog.

7. In a sewing machine., having a frame ineluding awork-supportandabracket-arm overhanging said Work-support,l in combination, arotaryarm-shaft journaled in4 said bracket-arm, a rotary loop-.takershaft journaled below said worksupport, a; rotary feed-actuating shaftjournaled vertically below and in spaced relation to said loop-takershaft, said three rotary shaftshaving substantially parallel rotationaxes disposed in a substantially# common verticalpla-ne, drivingconnections. for rotating; saidl shafts,A a pair of substantiallyparallel; feed rock-shafts journaled below said work-support, one: ofsaid; rock-shafts having its longitud-ina-lI axis in substantially saidvplane,` mean-s for actuating said rock-shafts from said rotarylfeed-actuatingshaft, a work-advancing feed-doa, and operative;connections withV said, rock-shafts for actuating said feed-dog.

8. In, a. sewing machine having a frame including a hollow base: and, awork-arm of the free-end type; extending from said base, in combination,a loop-taker shaft rotatably j ourna-led in said`r work-arm andextending lengthwise of said work-arm into. said baser,4 a loop-takercarried byV said shaft. atx the: free end portion of ftions, With saifeed-(10g.

gitudinal .axes in` substantiallyfthe saine vertical plane; a crank-arm4 carried by said rock-shaft "within saidl base;I an [eccentric carriedby said "feedfactuating shaft, a- ;pitman connecting 'said eccentric andcrank-arm, a second., feeds 'rook" 1 shaft journaledin said'WorkarmA Aatone side ,vof saidplane and lengthwiseiextending ini-,o .said

ibase, connections with *said feedakztuatin'gv shaft l'foractuatingfsaid second rockshaft a` Work- .,.'advancingfeed-dog.disposedat the free end p0r- `tion of rsaid Work-arm, andgopeifative` connec'k drockshafts forzgaotuating. said bination, a'loop-taker shaft rotatablyjournaled" ngyrnachine. having a fraInej'inV vcluding a h ollovv baseand`;-a Work-:arm ofthef rfree-end type extending .from said base,` incornf Said Work-arm; a feed-actuating, shaft rotatably journaled inIsaid hase,v driving connections for. .jv -r'otatingsaid shafts, afeedrockshaftjo1irna1ed f in andl extendinglengthvvise'ofV saidWo'rk-frnjintosaid base,`s a id loop-taker shaft,v feed-'actuating shaftandrooki-shaft havingtheir lonin and extendinglengthwise4 ofzsaid work-arm`#finto said base, a loop-'taker carried bysaid shaft zat the -free endportion fof -said Work-arm,- a feed-actuating shaft` rotatablyvjoiirnaledf in said "base, driving connections forrotating said loopvtaker shaft a plurality of times for-eachrota-- f tion'.v of saidfeed-actuatingv shaft, ya-Vfeed-adjg.; vance rock-'shaft jonrnaledin'andextendinggj J lengthwise *ofvv said work-arm into'. said base, ysaidthree `shafts having substantiallyA parallel longitudinalraxes disposedin s'libstantially the same vertical plane, a. feed-lift rock-shaft;Vextending r`lengthwise of" said `Work-'arm int'o said base',di jv.v'efr'gentLcrank?arms carried ley'y vthe respectivev lfeed-rocks-shafts, feed-advance and feed-lift eciv f y centrios carriedbyy said "feed-actua'tingi shaft `v`Within said base, pitmans"connecting said eccen-'g ,Ytrics with 'said crankf,arms,.vawork-advancing. Y @feed-dog" disposedat thefreek end'fpor'tionofiyv saidVworkarm,. "'and operative connections with 4 said rock-shafts foractuating 1 said feed-doa u -10. `In ar lsewing machine, 'i ncombinatiorna 'Y f horizontally disposed-rotary loop-taker shaft, a'loop-take;` carriediby oneend of'said shaft, a y

Bof

substantially in'a vertical plane`V containing the axis ofrrotationvlof'said'v160p-.taker shaft; means. Vf s n 'for lactuatingsaidfeed-advance rocker, a'ndfcon' neotionsiwithsaid feedadvance rocker`for' im?v parting work-advancing f and return" 'movementstO'Saidfeed-dQg.

feed-loar'vertically disposed` adjacent-said lloopg takerandA having a'loop-:taker-sliaft clearance opening, a lfeed-'dogextending laterallyfro'rn 7 `Y said feed-bar andgoverhangingsaid looptaker ,f

a feed-'lift rocker'lp'ivotally supporting saiolfeedv l bar formovexneritfof :said feed-bar abolitfanakis' l u rocker having-.itsrocking'axis substantiallyin a` n vertical plane containing `the ,axsfofrotation 7 of saidllooptaker shaft, rneans foractuatingsaidfeedadvance1"fJ'o l:er, connections Withsaid feed-' advanefrockeipforlroekingsaid feed-bar; andan` "hearing for' said loop-takerAvshaft* extending v .throughz saidshaftclearance openings of. saidVfeedlidar andlyffeed-advance Vro "fccmbnvatllfa Ynhorizontallyidisposed] rotarylooptakerfshaft;. v loolintal'ercarriedlby one I[endg ofsaidshaftf a 'tubular bearing-support; anantifrictionfbearing in 'said bearingsupport for said loop-#takershaft,` said antifriction hearin'gtbeing disp'osed'inclose proximitytofjsaidfloop-taken a@ vertically; dis posed fet-:dloar'enobr-a'ein'glsaid antifriction bear'. ingl and havingy a-'clearance openingforf-I'said i loearing-support,l a i f d-dog supported/,by saidfeed-doar and overhanging saidzrotary loop-taker', va; pivotal?v supporti. for said' feed-bar belovvfsaid loop-taker shaft'and providing formovement' lof saidA feed-bariabont an axis ,substantially par-- -allelto'the aXisof rotation of said loop-taker shaft;` means for .aotating saidpivotal- Support to impart'rising;andfallingmovementstosaid i feed-dog',a feige'dfadvancerocker' disposedadjaff cent said 'feed-bar and havinglFits rocking axis

